indent guides: Fix issue with entirely-whitespace lines (#31916)
Closes #26957
Release Notes:
- Fix an edge case where indent guides would be rendered incorrectly if
lines consisted of entirely whitespace
Co-authored-by: Ben Brandt <benjamin.j.brandt@gmail.com>
ec69b68e72Bennet Bo Fenner committed on 6/2/2025, 5:35:00 PM· committed by GitHubparent9dd18e5